Abstract: In order to reproduce the audio signal which has been recorded as an FM audio signal in the slanted tracks of a recording medium in tape form by means of read/write heads arranged on a rotating head drum, it is possible to use PLL circuits which are designed as FM demodulators and in each case form a phase-locked loop with a VCO. FM demodulators of this type generally operate satisfactorily e.g. in video recorders with improved audio signal recording, but there is the risk of the frequency of the VCO of the respective FM demodulator drifting when the read/write head assigned to it leaves the wrap-around region of the recording medium on the head drum and only being able to be synchronized with the FM audio signal when the said head re-enters the recording medium.